基于继电保护状态分析的电网故障诊断

Power grid fault diagnosis based on relay protection state analysis

针对基于逻辑关系的电网故障诊断方法诊断结果不可靠的缺点,提出基于继电保护状态分析的电网故障诊断方法。设计电网故障诊断模型,提出三种基于继电保护状态分析的诊断策略,包括电网状态诊断、保护行为诊断和断路行为诊断,以此为依据构建模型的故障假说,获取疑似故障数据。将疑似故障数据输入关联树进行迭代,以迭代结果作为所提方法的最终诊断结果。实验表明所提方法的诊断具有优异的可靠性和灵敏性。

The power grid fault diagnosis method based on logical relationship has the defect of unreliable diagnosis result.Therefore,the power grid fault diagnosis method based on analysis of relay protection state is proposed,the power grid fault diagnosis model is designed,and three diagnosis strategies（power grid state diagnosis,protection behavior diagnosis and turnoff behavior diagnosis）based on relay protection status analysis are presented. On these basis,the fault hypothesis of the model is constructed to get the suspected fault data. The suspected fault data is input into the relevance tree for iteration,whose result is deemed as the final diagnosis result of the proposed method. The experimental results show that the proposed method has high diagnosis reliability and sensitivity.